how do delete individual (dust) emitter particle that passes in front of the camera?
Solution- @3DSinghVFX Genius! it worked. Here's what I did. I went four frames before the particle passed in front of the camera and placed a simple plane in the path of the particle. I turned off all ray visibility in the cycles settings under the object tab for the plane and added collision physics to it and enabled 'kill particles'. I then went to the particle system and freed the bake (from the 4 frames ahead to add a small buffer but not so far as to risk the other particles i want to keep from changing) and stepped one frame at a time up to the problem frame and.... PERFECT! particle gone.